Wd 1 is a massive young stellar cluster with a mass of \(\sim 10^5 M_\odot \)  [1]} located at a distance of \(d = 4.12^{+0.66}_{-0.33}\)  kpc from the Sun [2]}. A typical extinction of the cluster members is \(A_V = 11.4 \pm 1.2\)  [3]}. W7 and W33, which are our targets, are very luminous B supergiants in the cluster [4]}. The color excesses of these two stars were calculated by using the stellar intrinsic colors of [5]}. Owing to the highest color excesses among our targets, the DIBs are the strongest; thus these stars of Wd 1 are the best targets to detect new weak DIBs.
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